2. 外语
  3. The new worker ____________ (仔细观察他们动作的每个细节) and soon learned how to operate the machine.

The new worker ____________ (仔细观察他们动作的每个细节) and soon learned how to operate the machine.

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问题 The new worker ____________ (仔细观察他们动作的每个细节) and soon learned how to operate the machine.
选项
答案carefully observed every detail of their action
解析
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大学英语四级

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